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Punica granatum L. protects mice against hexavalent chromium-induced genotoxicity
Ávila, Renato Ivan de; Guerra, Meirielle Teixeira; Borges, Kamilla de Almeida Souza; Vieira, Marcelo de Sousa; Oliveira Júnior, Luiz Marcos de; Furtado, Humberto; Mota, Mariana Flavia da; Arruda, Andréa Fernandes; Valadares, Marize Campos.
  • Ávila, Renato Ivan de; Federal University of Goiás. Faculty of Pharmacy. Celullar Toxicology and Pharmacology Laboratory. Goiânia. BR
  • Guerra, Meirielle Teixeira; Federal University of Goiás. Faculty of Pharmacy. Celullar Toxicology and Pharmacology Laboratory. Goiânia. BR
  • Borges, Kamilla de Almeida Souza; Federal University of Goiás. Faculty of Pharmacy. Celullar Toxicology and Pharmacology Laboratory. Goiânia. BR
  • Vieira, Marcelo de Sousa; Federal University of Goiás. Faculty of Pharmacy. Celullar Toxicology and Pharmacology Laboratory. Goiânia. BR
  • Oliveira Júnior, Luiz Marcos de; Federal University of Goiás. Faculty of Pharmacy. Celullar Toxicology and Pharmacology Laboratory. Goiânia. BR
  • Furtado, Humberto; Federal University of Goiás. Faculty of Pharmacy. Celullar Toxicology and Pharmacology Laboratory. Goiânia. BR
  • Mota, Mariana Flavia da; Federal University of Goiás. Faculty of Pharmacy. Celullar Toxicology and Pharmacology Laboratory. Goiânia. BR
  • Arruda, Andréa Fernandes; Federal University of Goiás. Faculty of Pharmacy. Celullar Toxicology and Pharmacology Laboratory. Goiânia. BR
  • Valadares, Marize Campos; Federal University of Goiás. Faculty of Pharmacy. Celullar Toxicology and Pharmacology Laboratory. Goiânia. BR
Braz. j. pharm. sci ; 49(4): 689-697, Oct.-Dec. 2013. ilus
Article in English | LILACS | ID: lil-704100
ABSTRACT
This study investigated the chemoprotective effects of Punica granatum L. (Punicaceae) fruits alcoholic extract (PGE) on mice exposed to hexavalent chromium [Cr(VI)]. Animals were pretreated with PGE (25, 50 or 75 mg/kg/day) for 10 days and subsequently exposed to a sub-lethal dose of Cr(VI) (30 mg/kg). The frequency of micronucleated polychromatic erythrocytes in the bone marrow was investigated and the Cr(VI) levels were measured in the kidneys, liver and plasm. For the survival analysis, mice were previously treated with PGE for 10 days and exposed to a single lethal dose of Cr(VI) (50 mg/kg). Exposure to a sub-lethal dose of Cr(VI) induced a significant increase in the frequency of micronucleated cells. However, the prophylactic treatment with PGE led to a reduction of 44.5% (25 mg/kg), 86.3% (50 mg/kg) and 64.2% (75 mg/kg) in the incidence of micronuclei. In addition, the 50 mg/kg dose of PGE produced a higher chemoprotective effect, since the survival rate was 90%, when compared to that of the non-treated group. In these animals, reduced amounts of chromium were detected in the biological materials, in comparison with the other groups. Taken together, the results demonstrated that PGE exerts a protective effect against Cr(VI)-induced genotoxicity.
RESUMO
Este estudo investigou os efeitos quimioprotetores do extrato alcoólico dos frutos da Punica granatum L. (Punicaceae) (EPG) em camundongos expostos ao cromo hexavalente [Cr(VI)]. Os animais foram pré-tratados com o EPG (25, 50 ou 75 mg/kg/dia) durante 10 dias e subsequentemente expostos a uma dose subletal de Cr(VI) (30 mg/kg). A frequência de eritrócitos policromáticos micronucleados na medula óssea foi investigada e os níveis de Cr(VI) foram quantificados nos rins, fígado e plasma. Para a análise de sobrevida, os camundongos foram previamente tratados com EPG durante 10 dias e expostos a única dose letal de Cr(VI) (50 mg/kg). A exposição à dose subletal de Cr(VI) induziu aumento significativo na frequência de células micronucleadas. Entretanto, o tratamento profilático com EPG levou à redução de 44,5% (25 mg/kg), 86,3% (50 mg/kg) e 64,2% (75 mg/kg) na incidência de micronúcleo. Além disso, a dose de 50 mg/kg de EPG produziu maior efeito quimioprotetor, uma vez que a taxa de sobrevivência foi de 90%, quando comparada àquela do grupo não tratado. Nesses animais, quantidades reduzidas de cromo foram detectadas nos materiais biológicos, em comparação com os outros grupos. Em conjunto, os resultados demonstram que o EPG exerce efeito protetor contra a genotoxicidade induzida pelo Cr(VI).
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Chromates / Genotoxicity Limits: Animals Language: English Journal: Braz. j. pharm. sci Year: 2013 Type: Article Affiliation country: Brazil Institution/Affiliation country: Federal University of Goiás/BR

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Full text: Available Index: LILACS (Americas) Main subject: Chromates / Genotoxicity Limits: Animals Language: English Journal: Braz. j. pharm. sci Year: 2013 Type: Article Affiliation country: Brazil Institution/Affiliation country: Federal University of Goiás/BR